Panasonic CS-HE9NKE Service Manual page 80

15.4.21 F11 (4-way valve Abnormality)
Malfunction Decision Conditions
•
When heating operation, when indoor pipe temperature is below 10°C.
•
When cooling operation, when indoor pipe temperature is above 45°C.
Malfunction Caused
•
Connector in poor contact.
•
Faulty sensor
•
Faulty outdoor unit PCB
•
4-way valve defective
Troubleshooting
80